“If you are a friend or acquaintance of Barry and have any information that could help locate him please call Crimestoppers on 1800 25 00 25.”

In a statement, the gardai added: “An Garda Síochána and Barry’s family and friends are very concerned for his safety and wellbeing.

“Please call Crimestoppers if you have any information which could assist in locating Barry.

“Members of the public can call Crimestoppers on 1800 25 00 25.

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Gardai have appealed for information

“Calls to Crimestoppers are completely anonymous.

“Callers do not need to leave their name or address. You may receive a reward for information which significantly the investigation. Alternatively, the public can contact us at Ballyfermot Garda Station or any Garda Station.

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“The Crimestoppers concept is simple – the call is free, there is no need to give one’s name, the phone is answered by specially trained Gardaí, and a cash reward may be paid in certain cases. Rewards are given at the discretion of the Gardaí.”